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Finding the Fourth Proportional to 66,629.72, 99,874.92 and 31,527.56

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Solution

The fourth proportional to 66,629.72, 99,874.92 and 31,527.56 is: 47,258.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,629.72 : 99,874.92 = 31,527.56 : x
  2. Step 2: Convert to fraction form
    66,629.72/99,874.92 = 31,527.56/x
  3. Step 3: Cross multiply
    66,629.72x = 99,874.92 × 31,527.56
  4. Step 4: Simplify right side
    66,629.72x = 3,148,812,532.80
  5. Step 5: Solve for x
    x = 3,148,812,532.80/66,629.72
  6. Step 6: Final answer
    x = 47,258.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.